Description of On-Board Diagnostics

DIAGNOSIS SYSTEM




a. Release the parking brake lever.

b. Check the indicator.
When the ignition switch is turned ON, check that the ABS warning light and BRAKE warning light goes on for approx. 3 seconds.

HINT:
- When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light is lit.
- If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit or BRAKE warning light circuit.

c. In case of not using TOYOTA hand-held tester:
Check the DTC.




1. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040
2. Turn the ignition switch ON.

3. Read the DTC from the ABS warning light on the combination meter.

HINT:
- If no code appears, inspect the diagnostic circuit or ABS warning light circuit.




- As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.

4. Codes are explained in the code table.
5. After completing the check, disconnect terminals Tc and E1, and turn off the display.
If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed 1st.




d. In case of using TOYOTA hand-held tester; Check the DTC.
1. Hook up the TOYOTA hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the DTC by following the prompts on the tester screen.
Please refer to the TOYOTA hand-held tester operator's manual for further details.




e. In case of not using TOYOTA hand-held tester;
Clear the DTC.
1. Using SST connect terminals Tc and CG of DLC3.
SST 09843-18040
2. Turn the ignition switch ON.
3. Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.
4. Check that the warning light shows the normal code.
5. Remove the SST from the terminals of DLC3.
SST 09843-18040




f. In case of using TOYOTA hand-held tester:
Clear the DTC.
1. Hook up the TOYOTA hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Operate the TOYOTA hand-held tester to erase the codes. (See hand-held tester operator's manual.)




g. Reference:
Using TOYOTA break-out-box and TOYOTA hand-held tester, measure the ECU terminal values.
1. Hook up the TOYOTA hand-held tester and TOYOTA break-out-box to the vehicle.
2. Read the ECU input/output values by following the prompts on the tester screen.

HINT:
TOYOTA hand-held tester has a "Snapshot" function. This records the measured values and is effective in the diagnosis of intermittent problems.
Please refer to the TOYOTA hand-held tester/TOYOTA break-out box operator's manual for further details.